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Renovation Wiki

Waterproofing for Bathrooms

When renovating bathrooms with a bathtub or a standing shower, it is essential to perform waterproofing work beforehand. If the waterproofing is not done correctly, it can have lasting consequences, including potential leaks or water seepage.

It is generally recommended to use professional waterproofing materials (e.g., Sika 107). It's advisable to communicate with the contractor before construction begins. The waterproofing procedure for the bathroom is as follows:

1. Prep the bathroom by plastering the surface.

2. Ensure the surface is smooth, remove any debris, and apply the first layer of waterproofing.

3. Once the first layer has dried, apply the second layer of waterproofing.

4. After the second layer has dried thoroughly, fill up the shower area to test for any leaks.

5. Mark the water level and wait for at least 8 hours.

6. If the water level remains unchanged, the waterproofing process is complete.

*It's crucial to take photos or record videos of the entire process for documentation.

*The waterproof membrane/material should cover the entire floor and extend to a height of 300mm on every wall. For the walls around bathtubs and shower areas, the waterproof material should extend up to at least 1800mm in height.

If homeowners have any questions about the renovation procedure, please feel free to contact us.


For many, renovation isn't an easy task. Aside from cost considerations, the process can be quite vexing for homeowners. That's where DECOLAND comes in with its all-in-one service approach. Whether it's finding the right renovation team, designers, getting accurate quotes, or managing the project, DECOLAND is here to support.

DECOLAND is here to help you solve all your renovation worries effortlessly!

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